Product overview
GRE Tubing
Glass-reinforced epoxy tubing for project-specific well applications. Share the well arrangement, fluid, temperature, pressure and connection requirements to request a configuration-specific datasheet and quotation.
Catalogue reference image. Confirm the supplied configuration against its drawing.
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Start with your application and the details you know. If a size, rating or quantity is undecided, tell us what you need to confirm.
Catalogue information: request the conditions and documents for the exact size and configuration offered. Separate range limits are not a combined rating.
Product at a glance
- 2 in / 16 MPa
- Thread 2 3/8 in; nominal ID 48 mm; coupling OD 84 mm; weight 2.5 kg/m; length 9.0 m
- 2 in / 20 MPa
- Thread 2 3/8 in; nominal ID 48 mm; coupling OD 92 mm; weight 2.9 kg/m; length 9.0 m
- 2 1/2 in / 12 MPa
- Thread 2 7/8 in; nominal ID 56 mm; coupling OD 104 mm; weight 2.6 kg/m; length 9.0 m
- 2 1/2 in / 14 MPa
- Thread 2 7/8 in; nominal ID 56 mm; coupling OD 104 mm; weight 3.0 kg/m; length 9.0 m
Connections & supply scope
Use the technical details below as a starting point. Include the required connections, interfaces and items to supply in your request so the offered configuration can be confirmed.
GRE tubing project inputs
Share what you know and mark anything undecided as “Not sure yet”. Partial information is enough to start a technical discussion.
View the project checklist
- Well duty and arrangement
- Describe the application, well depth, completion arrangement and proposed installed length.
- Fluid and temperature conditions
- Include known chemistry, operating and design temperatures, with units.
- Internal and external pressure
- Include differential conditions and the operating/design basis, with units.
- Axial and combined loads
- Share the project load basis or identify what needs engineering review.
- Dimensions, connections and installation
- Include thread or connection drawings, seals, equipment interfaces and handling requirements.
For a quotation, also include the quantity, delivery destination and required delivery window. List project specifications and documents needed for your review.
Technical details
- Description
- Specifications
Product overview
IFGS GRE tubing is downhole glass-reinforced epoxy tubing made with high-strength glass fibre reinforcement and epoxy resin. It is designed for water injection, sewage reinjection and polymer injection wells. The catalogue lists a general production range of DN40–DN100 and pressure ratings of 10–25 MPa. Final dimensions and ratings depend on the selected connection and project conditions.
Applications
Use GRE tubing for compatible downhole injection applications, including water injection, sewage reinjection and polymer injection. Confirm fluid compatibility, temperature, pressure, loads and well conditions for the specific configuration before selection.
Product standards
The catalogue references SY/T 7043 for high-pressure fiberglass tubing. It also references SY/T 6267-2006 for high-pressure fiberglass line pipe; that line-pipe standard has a separate product scope and should not be treated as the tubing standard. Confirm the applicable edition, compliance documents and acceptance requirements for the offered product.
Catalogue dimensions and weights are reference values, not an inspection or acceptance basis. See Specifications for the listed size configurations. Confirm current availability and exact ratings with IFGS before ordering.
Information for selection
- Well application, fluid composition, operating pressure and temperature.
- Required nominal size, useful length, connection and mechanical loads.
- Required inspection documents, quantity and delivery destination.
Configuration and technical documents
Request the drawing and technical data for the exact configuration offered. Confirm material compatibility, dimensions, connection details and the conditions applicable to any published rating before ordering.
Request a quotation
Send your project requirements, together with quantity and delivery destination. List the tubing, fittings, accessories and documentation you need included in the quotation.
Related reading
For terminology buyers mix up, see GRE tubing vs GRE pipe. Browse the Products hub for tubing, line pipe and joint families.
Technical documents
Request the product datasheet, connection information and qualification documents needed for your project. Our team will confirm document availability and the applicable version.
GRE Tubing Specification Summary
The figures below are standard and industry-published ranges for glass-reinforced epoxy (GRE) line pipe and tubing — they describe what the applicable API specifications and the GRE material class permit. They are not IFGS product ratings. Actual size, pressure and temperature ratings for your string are confirmed on the IFGS datasheet for the duty submitted.
IFGS sources glass-reinforced epoxy (GRE) fiberglass line pipe from licensed partner factories and handles spec confirmation and pre-shipment QC. The API license holder is the factory named on its certificate, verifiable on the API Composite List.
API Specification Scope
| Parameter | API Spec 15HR (high pressure) | API Spec 15LR (low pressure) | Source |
|---|---|---|---|
| Pressure rating range | 500–5,000 psi (3.45–34.5 MPa) | 150–1,000 psig cyclic (and, at manufacturer's option, static) | API Spec 15HR 4th Ed. scope; API Spec 15LR 7th Ed. §1.1 |
| Standard pressure increments | 250 psi (1.72 MPa) steps for pipe ≤ NPS 12; 100 psi (0.69 MPa) steps for pipe > NPS 12 | 50 psig steps from 150–300 psig; 100 psig steps from 300–1,000 psig | API Spec 15HR 4th Ed. scope; API Spec 15LR 7th Ed. §1.1 |
| Diameter range | Not fixed by the standard's scope; pressure increments are indexed to NPS 12 as the break point | Up to and including 24 in. | API Spec 15HR 4th Ed. scope; API Spec 15LR 7th Ed. §1.1 |
| Permitted materials | Rigid pipe components made from thermosetting resins reinforced with glass fibers — typical resins: epoxy, polyester, vinyl ester, phenolic. Thermoplastic resins are excluded. | API Spec 15HR 4th Ed. scope | |
| Manufacturing processes | Filament-wound rigid pipe components | Filament wound (FW) and centrifugally cast (CC) | API Spec 15HR 4th Ed. scope; API Spec 15LR 7th Ed. §1.1 |
| Covered equipment | Line pipe, couplings, fittings, flanges, reducers, adapters | Line pipe and fittings | API Spec 15HR 4th Ed. scope; API Spec 15LR 7th Ed. §1.1 |
| Intended service | Conveying produced fluids — oil, gas, nonpotable water and mixtures thereof — in the oil and gas producing industries. | API Spec 15HR / 15LR foreword and scope | |
| Current edition | 4th Ed., February 2016 (Errata 1: 2016, Errata 2: 2021) | 7th Ed., August 2001 (Errata 2018, Errata 2021) | API publication records |
To receive verified dimensions, pressure ratings and temperature derating for your string, use the Request the product datasheet button on this page.
Frequently asked questions
What is GRE tubing?
GRE stands for glass-reinforced epoxy: continuous glass fibre reinforcement in an epoxy resin matrix, roughly 70% glass and 30% resin. GRE is a thermosetting composite. API Spec 15HR permits epoxy, polyester, vinyl ester and phenolic resin systems reinforced with glass fibres, and excludes thermoplastic resins. In oilfield service, GRE tubing and line pipe to API 15HR convey produced fluids such as oil, gas and nonpotable water, where corrosion, weight and reliability govern material selection. Size, pressure and temperature ratings for your string are confirmed on the IFGS datasheet for the duty submitted.
How does GRE tubing compare with steel tubing?
On published industry figures: 1) Weight - GRE density is 1.8-2.0 g/cm3 against 7.85 g/cm3 for steel, so a like-rated GRE pipe is roughly 23-25% of the weight. 2) Corrosion - GRE does not corrode in produced water and brines and needs no coating or cathodic protection. 3) Stiffness - GRE axial modulus is 10-20 GPa against roughly 200 GPa for steel. 4) Thermal expansion - GRE expands more per degree but generates far lower anchor forces. 5) Flow - a Hazen-Williams coefficient of 150 gives a smoother bore and lower pumping energy. GRE is orthotropic and is not a drop-in substitution for steel in every service; suitability is confirmed on the IFGS datasheet.
What is the difference between API 15HR and API 15LR?
Both are API specifications for fiberglass line pipe in oil and gas production. API Spec 15HR covers high-pressure fiberglass line pipe from 500 to 5,000 psi; API Spec 15LR covers low-pressure fiberglass line pipe and fittings up to 1,000 psig cyclic operating pressure. In practice, 15HR governs high-pressure injection and production lines, while 15LR covers lower-pressure gathering, produced-water and utility services. Which specification applies to your string is confirmed on the IFGS datasheet.
How do I obtain the specifications for a specific GRE tubing string?
IFGS does not publish a generic datasheet, because GRE ratings are not catalogue constants - pressure class, wall thickness, joint type and temperature derating all follow from the duty the string will see. Send the duty, state the standard (API 15HR or 15LR) and the connection type. IFGS returns verified dimensions and ratings for that duty. Use the Request the product datasheet button on this page to start.
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